"""Read-only look at the Mercado Pago account behind MP_ACCESS_TOKEN.

    python -m app.mercadopago_probe [--bin 503143] [--valor 50]

Run from the api container's console (Portainer > Containers > api >
Console), or with "Verificar conta" on the Kanban's Integrations tab. It creates nothing and charges nothing: it asks Mercado Pago which
account the token belongs to, which card methods the account accepts, and how
it classifies a card number's first digits (type, issuer, instalments). That
is what payment errors such as 10111 (issuer) and 10113 (method excluded by a
rule) depend on.
"""
import argparse
import os
import sys

import httpx

from .core.secrets import load as load_secret_files

API = 'https://api.mercadopago.com'


def check(token, bin_='548083', amount='50', transport=None):
    """The account, its card methods and how a card's first digits are read."""
    http = httpx.Client(base_url=API, timeout=15, transport=transport,
                        headers={'Authorization': f'Bearer {token}'})
    result = {'token': 'test' if token.startswith('TEST-') else 'production'}
    me = http.get('/users/me')
    if me.status_code == 200:
        user = me.json()
        tags = user.get('tags') or []
        result['account'] = {'id': user.get('id'), 'nickname': user.get('nickname'),
                             'site': user.get('site_id'), 'test_user': 'test_user' in tags, 'tags': tags}
    else:
        result['account'] = {'error': f'HTTP {me.status_code}'}
    methods = http.get('/v1/payment_methods')
    result['cards'] = ([{'id': m.get('id'), 'type': m.get('payment_type_id'), 'status': m.get('status')}
                        for m in methods.json() if m.get('payment_type_id') in ('credit_card', 'debit_card')]
                       if methods.status_code == 200 else {'error': f'HTTP {methods.status_code}'})
    options = http.get('/v1/payment_methods/installments', params={'bin': bin_, 'amount': amount})
    result['bin'] = ([{'method': o.get('payment_method_id'), 'type': o.get('payment_type_id'),
                       'issuer': (o.get('issuer') or {}).get('name'),
                       'installments': [c.get('installments') for c in o.get('payer_costs') or []]}
                      for o in options.json()]
                     if options.status_code == 200 else {'error': f'HTTP {options.status_code} {options.text[:200]}'})
    return result


def main(argv=None):
    parser = argparse.ArgumentParser(prog='python -m app.mercadopago_probe')
    parser.add_argument('--bin', default='548083', help="the card's first six digits")
    parser.add_argument('--valor', default='50', help='amount in reais for the instalment lookup')
    args = parser.parse_args(argv)
    load_secret_files()
    token = os.environ.get('MP_ACCESS_TOKEN', '')
    if not token:
        print('MP_ACCESS_TOKEN is not set in this container.')
        return 1
    import json
    print(json.dumps(check(token, args.bin, args.valor), indent=2, ensure_ascii=False))
    return 0


if __name__ == '__main__':
    sys.exit(main())